An inline engine having a nine inch bore and...

Question 1 / 270705eccefa1bacbc34ba4d4745d

Question 1 of 270705eccefa1bacbc34ba4d4745d

An inline engine having a nine inch bore and more than eight cylinders will __________.

Question 1 of 27070

An inline engine having a nine inch bore and more than eight cylinders will __________.

🔍 Key Concepts

• Explosion relief valves on internal combustion engines used in marine service • How the number of cylinders and bore size affect safety requirements • Relevant requirements in 46 CFR for crankcase explosion relief on engines

💭 Think About

• Consider why larger-bore, multi-cylinder inline engines present a higher explosion risk in the crankcase. • Think about whether regulations usually say a fixed number of valves, or a minimum based on engine size and configuration. • Ask yourself: if an engine has more than eight cylinders, would safety rules likely require fewer, exactly, or at least a certain number of relief valves?

✅ Before You Answer

• Check what 46 CFR says about minimum crankcase explosion relief area per cylinder or per engine side. • Verify whether regulations describe the requirement as a fixed count (e.g., two or three) or as at least a certain number that can increase with size. • Confirm that engines above a certain bore size (e.g., 8 5/8 in or 9 in) do in fact require explosion relief valves, rather than being exempt.

Question 1 of 27070

An inline engine having a nine inch bore and more than eight cylinders will __________.

incorporate the use of two explosion relief valves

have three explosion relief valves

have at least eight explosion relief valves

not be required to have explosion relief valves

Question 1 / 270705eccefa1bacbc34ba4d4745d

Question 1 of 270705eccefa1bacbc34ba4d4745d

An inline engine having a nine inch bore and more than eight cylinders will __________.

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Question 1 of 27070

An inline engine having a nine inch bore and more than eight cylinders will __________.